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농촌지역 수질개선을 위한 인공습지실험시설의 3 년간 실험결과 검토
윤춘경(C . G . Yoon),권순국(S . K . Kwun),우선호(S . H . Woo),권태영(T . Y . Kwon) 한국물환경학회 1999 한국물환경학회지 Vol.15 No.4
Sewage treatment study was performed for three years by constructed wetland experimental system at Konkuk University. The system was a subsurface flow type, and consisted of 60㎝ depth of sand and reeds. It worked continuously including winter time, and the sewage flowed without freezing even when average daily air temperature was below -10℃. Average removal rates of BOD, COD, and SS were in the range of 60∼71%, T-P removal rate was about 50%, and T-N removal rate was 24.3%. The reason for poor T-N removal might be due to high influent concentration and shorter retention times. The effluent of the wetland system often exceeded effluent water quality standards for sewage treatment plant, therefore, further treatment could be required if the effluent needs be discharged to the public water. Wetland system involves relatively large land area and could be suitable for rural area rather than urban area. Therefore, utilization of sewage for agricultural purpose or subsequent land treatment is recommended as a ultimate disposal depending on site specific environmental conditions.
결정질 태양전지에서 니켈 전극 상요을 위한 열처리 방안
정우원(W.W. Jung),김성철(S.C. Kim),경도현(D.H. Kyung),권태영(T.Y. Kwon),이영석(Y.S. Lee),허윤성(Y.S. Heo),박승일(S.I. Park),이준신(J.S. Yi) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.4
고효율 태양전지를 위한 결정질 태양전지의 구조 중 UNSW에서 개발한 BCSC(buried contact solar cell)가 있는데, 이는 전면 전극을 laser 처리 후 무전해니켈 도금으로 형성한 것이다. 이같은 진면 전극을 형성하기 위해서는 무전해 nickel 도금 후 열처리가 필수적이다. 우리는 이 공정을 확립하기 위해 결정질 wafer에 후연을 PECVD로 SiNx막을 형성하여 30Ω/□로 도핑한 후 후면을 불산으로 제거한 상태에서 양면을 니켈 무전해 도금으로 전극을 형성하여 300℃, 350℃, 400℃에 서 각각 3,6,9분간 진행하였다. 그 결과 400℃에서 3분간 열처리된 sample이 상대적으로 가장 명확한 IV curve를 형성하였다. 이 실험의 결과는 PN 접합 구조에서 전극을 nickel로 사용할 때 유용하게 사용될 수 있다.
권태영,홍성화,주흥재 대한혈관외과학회 1986 Vascular Specialist International Vol.2 No.1
Renovascular hypertension is surgically correctable hypertension. Recent advances in diagnostic techniques and vascular reconstructive techniques now enable successful management in many patients with renovascular hypertenaion. We observed one case of renovascular hypertension due to left renal arterial stenosis in 21 year old male patient with chief complaints of severe occipital headache and decreased visual acuity for 3 years. The treatment was done by left aortorenal bypass procedure with Gore-Tex and good result was obtained. Herein we reported a case of renovascular hypertension with a review of the literatures.